1286135423 has 2 divisors, whose sum is σ = 1286135424. Its totient is φ = 1286135422.

The previous prime is 1286135419. The next prime is 1286135491. The reversal of 1286135423 is 3245316821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1286135423 - 2² = 1286135419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286135623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643067711 + 643067712.

It is an arithmetic number, because the mean of its divisors is an integer number (643067712).

Almost surely, 2^1286135423 is an apocalyptic number.

1286135423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286135423 is an equidigital number, since it uses as much as digits as its factorization.

1286135423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 1286135423 is about 35862.7302781035. The cubic root of 1286135423 is about 1087.4990842992.

It can be divided in two parts, 12861 and 35423, that added together give a palindrome (48284).

The spelling of 1286135423 in words is "one billion, two hundred eighty-six million, one hundred thirty-five thousand, four hundred twenty-three".